A tire for a two-wheeled motorcycle includes a continuous carcass-type reinforcement structure, having reinforcement elements and anchored on each side to a bead. Each bead extends radially by a sidewall, which meets up radially with a tread. Under the tread is a crown reinforcement structure including at least one working layer, and which does not comprise any circumferentially oriented reinforcement elements. Over the profile of the tire in a radial plane, in its part outside of the two points of tangency of the curvilinear abscissa of the carcass-type reinforcement structure with perpendiculars to the axis of rotation at least one layer of working reinforcement elements is at least partially radially to the inside of the part of the carcass-type reinforcement structure radially to the outside of the two points of tangency.
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1. A motorcycle tire comprising a continuous carcass-type reinforcement structure, formed of reinforcement elements and anchored on each side of the tire to a bead whose base is intended to be fitted on a rim seat, each bead being extended radially towards the outside by a sidewall, the sidewalls meeting up radially towards the outside with a tread, and comprising under the tread a single crown reinforcement structure consisting of at least one layer of reinforcement elements known as a working layer, said single crown reinforcement structure not comprising any circumferentially oriented reinforcement elements, wherein, over the profile of the tire in a radial plane, in its part radially to the outside of the two points of tangency of the curvilinear abscissa of the carcass-type reinforcement structure with perpendiculars to the axis of rotation at least one layer of working reinforcement elements is at least partially radially to the inside of the part of the carcass-type reinforcement structure radially to the outside of the two points of tangency of the curvilinear abscissa of the carcass-type reinforcement structure with perpendiculars to the axis of rotation, wherein at least one layer of working reinforcement elements comprises at least one continuous reinforcement cord forming, in a central zone of said layer, portions having identical angles formed with the longitudinal direction, said angles being measured at the points of intersection with a circumferential plane, wherein two adjacent portions are linked by a loop, and wherein the portions form an angle with the longitudinal direction of between 10 and 80°, wherein the angles formed by said portions with the longitudinal direction are variable in the transverse direction and wherein said angles are greater at their axially outer edges than at the level of an equatorial plane of the tire, wherein the angles of the portions continuously increase in monotonic manner from the equatorial plane of the tire as far as the edges of the working layer, wherein the largest angles of said portions approach 90°.
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This application is a Continuation of International Application Serial No. PCT/EP04/14345 filed on Dec. 16, 2004 and which published as WO 2005/070704 on Aug. 4, 2005.
The present invention relates to a tire intended to be fitted on a vehicle and more particularly intended to be fitted on a two-wheeled vehicle such as a motorcycle.
Although not limited to such an application, the invention will be more particularly described with reference to such a motorcycle, or motorbike, tire.
Tire reinforcement armatures or tire reinforcements, in particular for motorcycle tires, are currently—and most frequently—formed by stacking one or more plies conventionally designated “carcass plies”, “crown plies”, etc. This way of designating reinforcement armatures stems from the manufacturing process, which consists of making a series of semi-finished products in the form of plies, provided with, often longitudinal, cord reinforcements, which are then assembled or stacked so as to build a tire blank. The plies are made flat, with large dimensions, and are then cut as a function of the dimensions of a given product. The plies are also assembled substantially flat in a first phase. The blank thus produced is then shaped into the toroidal profile typical of tires. The semi-finished products known as “finishing products” are then applied to the blank, in order to obtain a product which is ready for vulcanization.
Such a “conventional” type of process involves, in particular for the tire blank manufacturing phase, the use of an anchoring element (generally a bead wire), used to effect anchoring or retention of the carcass reinforcement in the tire bead zone. Thus, for this type of process, a turn-up is formed from a portion of all the plies constituting the carcass reinforcement (or of only some) around a bead wire disposed in the bead of the tire. The carcass reinforcement is thereby anchored in the bead.
The widespread use in the industry of this type of conventional process, despite numerous variants in the manner of producing the plies and the assemblies, has led the person skilled in the art to use a vocabulary derived from the process; hence the terminology in general use, comprising in particular the terms “plies”, “carcass”, “bead wire”, “shaping” to designate transition from a flat profile to a toroidal profile, etc.
Tires now exist which do not strictly speaking comprise “plies” or “bead wires” which fit the above definitions. For example, document EP 0 582 196 describes tires manufactured without the aid of semi-finished products in the form of plies. For example, the reinforcement elements of the various reinforcement structures are applied directly onto the adjacent layers of rubber mixes, the whole being applied in successive layers onto a toroidal core whose shape allows the direct obtainment of a profile resembling the final profile of the tire in the process of being manufactured. Thus, in this case there are no longer “semi-finished products”, or “plies” or “bead wires”. The basic products such as the rubber mixes and the reinforcement elements in the form of cords or filaments are applied directly to the core. Since this core is toroidal in shape, the blank no longer has to be shaped in order to be transformed from a flat profile to a profile in the form of a torus.
Furthermore, the tires described in this document do not have the “traditional” carcass ply turn-up about a bead wire. This type of anchoring is replaced by an arrangement in which circumferential cords are disposed adjacent to said sidewall reinforcing structure, the whole being immersed in an anchoring or bonding rubber mix.
Assembling processes using a toroidal core also exist which use semi-finished products specially adapted for rapid, effective and simple laying on a central core. Finally, it is also possible to use a composite comprising certain semi-finished products to achieve certain architectural aspects (such as plies, bead wires, etc), while others are achieved by the direct application of mixes and/or reinforcement elements.
In the present document, so as to take account of recent technological developments both in the field of manufacture and in the design of products, the conventional terms such as “plies”, “bead wires” etc are advantageously replaced by neutral terms or terms which are independent of the type of process used. Thus, the term “reinforcement of carcass type” or “sidewall reinforcement” may be used to denote the reinforcement elements of a carcass ply in the conventional process and the corresponding reinforcement elements, generally applied at the level of the sidewalls, of a tire produced according to a process not using semi-finished products. The term “anchoring zone”, for its part, may denote both the “traditional” carcass ply turn-up about a bead wire of a conventional process and the assembly formed by the circumferential reinforcement elements, the rubber mix and the adjacent sidewall reinforcement portions of a bottom zone produced using a process involving application on a toroidal core.
As in the case of all other tires, we are witnessing the radialization of motorcycle tires, the architecture of such tires comprising a carcass reinforcement formed of one or two layers of reinforcement elements forming with the circumferential direction an angle which may be between 65° and 90°, said carcass reinforcement being radially surmounted by a crown reinforcement formed at least of generally textile reinforcement elements. Non-radial tires do still exist, however, and the invention also relates to them. The invention also relates to partially radial tires, that is to say whose reinforcement elements of the carcass reinforcement are radial over at least part of said carcass reinforcement, for example in the part corresponding to the crown of the tire.
Numerous crown reinforcement architectures have been proposed, depending on whether the tire is intended to be fitted at the front of the motorcycle or at the rear. A first structure consists, for said crown reinforcement, in using solely circumferential cables, and said structure is more particularly used for the rear position. A second structure, directly inspired by structures commonly used in passenger-vehicle tires, has been used to improve wear resistance, and consists in using at least two crown layers of reinforcement elements which are parallel to each other within each layer but crossed from one layer to the next, forming acute angles with the circumferential direction, such tires being more particularly suitable for the front of motorcycles. Said two crown layers may be associated with at least one layer of circumferential elements, generally obtained by helical winding of a strip of at least one reinforcement element coated with rubber.
Patent no. FR 2 561 588 (corresponding to British Published Application No. 2 157 239) thus describes such a crown reinforcement, having at least one ply whose reinforcement elements form with the circumferential direction an angle which may vary between 0° and 8°, the modulus of elasticity of such elements amounting to at least 6000 N/mm2, and, disposed between the carcass reinforcement and the ply of circumferential elements, a shock-absorption layer formed mainly of two plies of elements crossed from one ply to the next forming between them angles of between 60° and 90°, said crossed plies being formed of textile reinforcement elements having a modulus of elasticity of at least 6000 N/mm2.
Document EP 0 456 933, with a view to providing a motorcycle tire with excellent stability at high speed as well as excellent contact with the ground, teaches for example that a crown reinforcement should be made with at least two plies: a first ply, radially the closest to the carcass reinforcement, being composed of cables oriented at an angle of between 40° and 90° relative to the circumferential direction and the second ply, radially the closest to the tread, being composed of cables wound helically in the circumferential direction.
U.S. Pat. No. 5,301,730, with a view to enhancing the drive ability of a tire designed for the rear of a motorcycle, proposes a crown reinforcement composed, proceeding from the radial carcass reinforcement to the tread, of at least one ply of substantially circumferential elements and two plies of elements crossed from one ply to the next and forming with the circumferential direction an angle which may be between 35° and 55°, elements of aromatic polyamide being suitable for use as the ply of elements parallel to the circumferential direction and aliphatic polyamide being suitable for the plies of crossed elements.
The object of the invention is to provide motorcycle tires whose crown reinforcement structure does not comprise any circumferentially oriented reinforcement elements and comprises at least one layer of working reinforcement elements, at lower cost than those currently obtained, without for all that impairing the properties required to satisfy the users.
This aim is achieved according to the invention by a tire comprising a continuous carcass-type reinforcement structure, formed of reinforcement elements and anchored on each side of the tire to a bead whose base is intended to be fitted on a rim seat, each bead being extended radially towards the outside by a sidewall, the sidewalls meeting up radially towards the outside with a tread, and comprising under the tread a crown reinforcement structure consisting of at least one at least one layer of reinforcement elements known as a working layer, said crown reinforcement structure not comprising any circumferentially oriented reinforcement elements, and, over the profile of the tire in a radial plane, in its part radially to the outside of the two points of tangency of the curvilinear abscissa of the carcass-type reinforcement structure with perpendiculars to the axis of rotation at least one layer of working reinforcement elements being at least partially radially to the inside of the part of the carcass-type reinforcement structure radially to the outside of the two points of tangency of the curvilinear abscissa of said carcass-type reinforcement structure with perpendiculars to the axis of rotation.
The longitudinal direction of the tire, or circumferential direction, is the direction corresponding to the periphery of the tire and defined by the rolling direction of the tire.
A circumferential plane or circumferential section plane is a plane perpendicular to the axis of rotation of the tire. The equatorial plane is the circumferential plane passing through the centre or crown of the tread.
The transverse or axial direction of the tire is parallel to the axis of rotation of the tire.
A radial plane contains the axis of rotation of the tire.
For the purposes of the present invention, a working ply has a curvilinear abscissa between the two points of tangency of the curvilinear abscissa of the carcass-type reinforcement structure with perpendiculars to the axis of rotation; the axial width of a working ply is thus less than the axial distance between these two points of tangency of the curvilinear abscissa of the carcass-type reinforcement structure with perpendiculars to the axis of rotation.
For the purposes of the invention, a continuous carcass-type reinforcement structure is formed of reinforcement elements which are continuous from one bead to the other.
The tire according to the invention allows financial savings on two counts. Firstly, the quantity of material used to form a layer of working reinforcement elements is reduced relative to a conventional tire of the same dimensions, due to the radially inner position of at least part of a layer of working reinforcement elements relative to the carcass-type reinforcing structure. Consequently, the manufacturing time for said layer of working reinforcement elements may be less than that necessary to produce the layer of a conventional tire, in particular in the case of production using a hard core.
According to the invention, when the tire comprises at least two carcass-type reinforcement layers, at least one layer of working reinforcement elements is positioned at least in part radially to the inside of at least two carcass-type reinforcement layers.
A tire according to the invention, having at least one part of the crown reinforcement structure formed radially to the inside of the carcass-type reinforcement structure, is thus advantageously produced using a manufacturing method of the hard core or rigid form type.
According to a first embodiment of the invention, the crown reinforcement structure is entirely produced radially to the inside of at least one carcass structure, that is to say to the inside of at least one carcass layer. At least one carcass-type reinforcement structure thus radially covers the entire crown reinforcement structure.
According to a second preferred embodiment of the invention, at least one layer of working reinforcement elements of the crown reinforcement structure is provided radially to the outside of the carcass-type reinforcement structure. According to this second embodiment of the invention, the layer of working reinforcement elements assumes the function of protecting the carcass and the other layers of the crown reinforcement structure against possible mechanical stresses.
In an advantageous variant of the invention, a layer of working reinforcement elements may be provided in several parts positioned at various radial positions or different levels of the tire. Such a tire may in particular comprise a part of the layer of working reinforcement elements radially to the outside of the reinforcement elements of the carcass structure in the central part of the tire, that is to say under the central part of the tread. This part of the layer of working reinforcement elements thus allows in particular protection of the carcass against any stresses which may affect the central part of the tread, considered as the most exposed. The invention additionally provides, in the case of a layer of working reinforcement elements made in several parts positioned in different radial positions, for the distribution of these various parts not to be symmetrical relative to the equatorial plane, or circumferential plane passing through the centre of the crown of the tire. Such an asymmetrical distribution may additionally be associated with the selection of different materials for the reinforcement elements of the working layers.
In accordance with this type of embodiment of a layer of working reinforcement elements divided into several parts, the invention advantageously provides mutual overlapping of the axial ends of said parts.
According to an advantageous variant of the invention, at least one layer of working reinforcement elements consists of at least one continuous reinforcement cord forming in the central zone of said layer portions having identical angles formed with the longitudinal direction, said angles being measured at the points of intersection with a circumferential plane, two adjacent portions being linked by a loop or bend formed by said cord, and the portions forming an angle with the longitudinal direction of between 10 and 80°.
According to a preferred embodiment of the invention, in the central zone of said working layer the portions are equidistant from one another over all circumferential planes.
Other advantageous embodiments of the invention additionally provide for the portion patterns to be equidistant from one another over all circumferential planes. Portion pattern should be understood to mean an assembly of several portions disposed in a given, repeated configuration.
The central zone of a working layer is a circumferential zone of said layer axially between two lateral zones, axially outside said central zone. According to a preferred embodiment of the invention, this central zone is centered on the crown of the tire tread.
The term “cord” generally denotes any of monofilaments, multifilament fibers (possibly twisted around themselves) or assemblies such as textile or metal cables, plied yarn or alternatively any type of equivalent assembly such as, for example, a hybrid cable, this being the case whatever the material(s) or the possible treatment of these cords, for example surface treatment or coating or pre-sizing to improve adhesion to the rubber or any other material.
According to this advantageous variant of the invention, the working layer is made with at least one cord, of which no free end is present at the edges of said layer. Preferably, the layer is made with a single cord and the layer is of the “mono-filament” type. However, industrial production of such layers results in discontinuities, in particular due to reel changes. A preferred embodiment of the invention further consists in using only a single or a small number of cords for a working layer and it is appropriate to arrange the beginnings and ends of cords in the central zone of said layer.
A tire produced thus according to the invention comprises a reinforcement structure which does not exhibit any reinforcement element free end at the level of the axially outer edges of the working layers.
Studies carried out have shown in particular that the presence of conventional layers of reinforcement elements forming an angle with the longitudinal direction results in local circumferential and shearing rigidities which diminish near the edges of said layers, the tension at the ends of the reinforcement elements being zero. A local tension of zero for the reinforcement elements results in reduced effectiveness of said reinforcement elements in this zone. The rigidities of the edges of the layers are particularly important when the tire is used on the most severe cambers, when cornering, the part of the tire corresponding to said zones then facing the ground.
The production of motorcycle tires results in large curvature values if such tires are to be used on a camber. A tire produced according to this variant of the invention and which comprises a reinforcement structure which does not exhibit any reinforcement element free end at the level of the axially outer edges of the working layers thus makes it possible in particular to consolidate the properties of tire grip and drive ability for use on severe camber.
In the central zone of the working layers, that is to say in the part of the working layers which does not include the loops linking the portions together, the portions display identical angles formed with the longitudinal direction, said angles being measured at the points of intersection with a circumferential plane, whatever is said circumferential plane. In other words, for a given circumferential section plane, the portions all display the same angle formed with the longitudinal direction at the points of intersection with said circumferential section plane. Furthermore, the above-mentioned angle may vary depending on the circumferential section plane considered.
According to a previously mentioned preferred embodiment, in the central zone of the working layers the portions are equidistant from one another in circumferential section planes; the distance between adjacent portions being able itself to vary depending on the circumferential section plane considered, or more precisely, the distance between adjacent portions being capable of varying in the axial direction.
Such a tire which, as mentioned above, is advantageously made using a method of the hard or toroidal core type, allows in particular positioning of the reinforcement elements in the quasi-final position; in fact, since a shaping stage is not required with this type of process, the reinforcement elements are not displaced any more after their positioning. If a method comprising a shaping stage, such as shaping or application of a flat ply on the profile of the tire, is used, the curvature of a motorcycle tire necessitates preparation of a special ply for allowing the obtainment of portions, displaying identical angles and possibly equidistant from one another over all circumferential planes, linked by a loop; in particular at the ends of the ply and therefore at the level of the loops, shaping in accordance with the curvature of a motorcycle tire results in variations in particular at the edges of the tire which modify the position of the reinforcement elements. This modification of the positions is additionally disrupted by the presence of the loops, which cause non-homogeneous modifications. For this reason, the various portions do not display angles, formed with the longitudinal direction, which are identical in the circumferential section planes. Likewise, they are not equidistant from one another in circumferential section planes.
In an advantageous embodiment of the invention, in particular in order to optimize the rigidities of the reinforcement structure along the meridian of the tire, and in particular at the edges of the working layers, the angles formed by said portions of the cord of the working layers with the longitudinal direction are variable in the transverse direction such that said angles are greater at the axially outer edges of the layers of reinforcement elements relative to the angles of said portions measured at the level of the equatorial plane of the tire.
Use of a method of the hard core type which in particular allows positioning of the reinforcement elements in the quasi-final position without the need for a shaping stage exhibits further advantages. In fact, a method of the hard core type in particular allows simple angle variations distinctly greater than it is possible to obtain using processes comprising a shaping stage. Furthermore, said angle variations, said angle tending towards 90° at the edges of the working layers, result in an increase in pitch and promote production of the loops, due to the reduction in bulk.
The invention further proposes a tire comprising a continuous carcass-type reinforcement structure, formed of reinforcement elements and anchored on each side of the tire to a bead whose base is intended to be fitted on a rim seat, each bead being extended radially towards the outside by a sidewall, the sidewalls meeting up radially towards the outside with a tread, and comprising under the tread a crown reinforcement structure consisting of at least one layer of reinforcement elements known as a working layer and not comprising any circumferentially oriented reinforcement elements, and, over the profile of the tire in a radial plane, at least one layer of working reinforcement elements being at least partially radially to the inside of the part, of the carcass-type reinforcement structure, radially to the outside of the two points of tangency of the curvilinear abscissa of said carcass-type reinforcement structure with perpendiculars to the axis of rotation, said layer of working reinforcement elements consisting of at least one continuous reinforcement cord forming in the central zone of said layer portions, such that two adjacent portions are linked by a loop, and such that said portions form an angle with the longitudinal direction of between 10 and 80°, said angles formed by said portions with the longitudinal direction being variable in the transverse direction in such a way that said angles are greater at the axially outer edges of the layers of reinforcement elements relative to the angles of said portions measured at the level of the equatorial plane of the tire.
A first embodiment of the variant embodiments of the invention according to which the angles formed by said portions of the cord of the working layers with the longitudinal direction are variable in the transverse direction consists in varying the angle of the portions in monotonic manner from the equatorial plane of the tire as far as the edges of the working layer.
A second embodiment of these variants consists in making the angle develop by stages from the equatorial plane of the tire as far as the edges of the working layer.
A last embodiment of these variants consists in the angle developing such that given values are obtained for given axial positions.
These various embodiments of the variant embodiments of the invention according to which the angles formed by said portions of the cord of the working layers with the longitudinal direction are variable in the transverse direction allow in other words the obtainment of considerable circumferential rigidity of the crown reinforcement structure due to the presence of closed, that is to say small, angles in the crown zone of the tire, that is to say in the zone surrounding the equatorial plane. And, on the other hand, the presence of open angles, that is to say angles tending towards 45°, or even towards 90°, may be obtained at the edges of the working layer or more precisely at the level of the shoulders of the tire to improve the grip, drive ability, comfort, or indeed the operating temperature of the tire; in fact, such variations in angle allow adjustment of the shearing rigidities of the working layers.
Advantageously, in the case of a radial structure, the reinforcement elements of the carcass-type reinforcement structure form an angle of between 65° and 90° with the circumferential direction.
According to preferred embodiments of the invention, the portions form an angle with the longitudinal direction of between 20 and 75°. Preferably, the angle is less than 50° and more preferably less than 40°.
According to a preferred embodiment of the invention, the crown reinforcement structure of the tire comprises at least two layers of reinforcement elements such that from one layer to the next the portions form between them angles of between 20 and 160° and preferably between 40 and 100°.
According to a preferred embodiment of the invention, the reinforcement elements of the working layers are of textile material.
According to another embodiment of the invention, the reinforcement elements of the working layers are of metal.
Other advantageous details and features of the invention will become clear below from the description of examples of embodiment of the invention made with reference to
To simplify understanding thereof,
Said carcass layer 2 is anchored on either side of the tire 1 in a bead 3 whose base is intended to be mounted on a rim seat. Each bead 3 is extended radially towards the outside by a sidewall 4, said sidewall 4 meeting up radially towards the outside with the tread 5. The tire 1 thus constituted has a value of curvature greater than 0.15 and preferably greater than 0.3. The value of curvature is defined by the Ht/Wt ratio, that is to say by the ratio of the height of the tread to the maximum width of the tread of the tire. The value of curvature will advantageously be between 0.25 and 0.5 for a tire intended to be fitted at the front of a motorcycle and it will advantageously be between 0.2 and 0.5 for a tire intended to be fitted at the rear.
The tire 1 further comprises under the tread a crown reinforcement consisting in the present case of two working layers 6, 7. Said working layers 6, 7 are, in accordance with the invention, positioned radially to the inside of the part of the carcass layer 2 radially outside the two points of tangency A, B of the curvilinear abscissa of said carcass layer 2 with the perpendiculars 100, 101 to the axis of rotation.
As mentioned above, an embodiment of this type allows financial savings on two counts. Firstly, the quantity of material used to form such layers of working reinforcement elements is reduced due to the radial position of the layers 6 and 7 to the inside of the carcass layer 2 compared with the same tire produced in conventional manner with working layers radially outside the carcass. And consequently, the laying time for the reinforcement cord of said layers 6 and 7 is also less than the time necessary for production of the above-mentioned conventional layers.
The working layers 6, 7 consist of textile reinforcements produced according to the invention with at least one continuous reinforcing cord forming parallel portions in the central zone of said layer and the adjacent portions being connected by loops. The arrangement of the cords is such that the portions are crossed from a layer 6 to the following layer 7.
In the case of
According to one or other of the embodiments illustrated in
Furthermore, with regard to the production of such a tire, this is advantageously obtained by manufacture of the hard core type. Thus, laying of the cords 9, 9′ may be performed by a robot which deposits them precisely at the desired angles in their quasi-final position. In fact, hard core type manufacture allows precise positioning of the cords because, since the hard core sets the required internal cavity shape, the profile of the tire is not subject to modification during building.
Such an embodiment of the working layer 65 in several parts may also be combined with the presence of a second working layer 75 radially to the outside of the carcass layer 25, in particular for reinforcing the protective function with regard to the carcass layer 25.
| Patent | Priority | Assignee | Title |
| 10882364, | Dec 30 2014 | Bridgestone Americas Tire Operations, LLC | Tire with concave sidewalls |
| Patent | Priority | Assignee | Title |
| 2884040, | |||
| 2930425, | |||
| 2976905, | |||
| 3195604, | |||
| 3233649, | |||
| 3327753, | |||
| 3730246, | |||
| 3780782, | |||
| 3789900, | |||
| 3861440, | |||
| 4150703, | Oct 22 1976 | CATERPILLAR INC , A CORP OF DE | Belt separation-resistant tire configuration |
| 4399187, | Jul 26 1980 | GOODYEAR TIRE & RUBBER COMPANY, THE A CORPORATION OF OHIO | Reinforced articles |
| 5301730, | Jan 07 1991 | Compagnie Generale de Etablissements Michelin - Michelin & Cie | Motorcycle tires |
| 5339878, | May 18 1990 | Bridgestone Corporation | Pneumatic tires for motorcycles including a spirally wound belt cord layer |
| 5618362, | Jan 25 1994 | Tyre Consult Venlo B. V. | Radial ply tire with belt-shaped reinforcing insert |
| 5660656, | Aug 05 1992 | MANUFACTURE FRANCAISE DES PNEUMATIQUES MICHELIN | Tire with anchored carcass |
| 5858138, | Nov 21 1996 | Compagnie Generale des Etablissements Michelin - Michelin & Cie | Carcass reinforcement, made of a single filament, for a tire |
| 6561245, | Jul 10 1998 | The Goodyear Tire & Rubber Company | Thread reinforcement means for extended mobility tire |
| 7128112, | Aug 09 2002 | MICHELIN RECHERCHE ET TECHNIQUE S A | Tire for two-wheeled vehicles comprising circumferential crown reinforcement elements |
| 7658216, | Aug 09 2002 | MICHELIN RECHERCHE ET TECHNIQUE S A | Tire for two-wheeled vehicle comprising looped crown reinforcement |
| DE2118748, | |||
| DE3621646, | |||
| GB2157239, | |||
| JP10081109, | |||
| JP11198616, | |||
| JP6115311, | |||
| WO2004018236, | |||
| WO2004018237, |
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| Jan 01 2017 | MICHELIN RECHERCHE ET TECHNIQUE S A | Compagnie Generale des Etablissements Michelin | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 052863 | /0624 |
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